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HK Universal LEM Kit Complete - HK45, USP, & USPC

SKU: HKP-00316

HK Pistol LEM Conversion Kit.

New just released from HK Germany the "universal" LEM conversion kit for USP, USPC & HK45, HK45C pistols. The New universal LEM kit also fits the recently released HK45C & HK45 Pistols.

This kit will enable you to convert your V1-V10 HK Pistol to the LEM Conversion. Each LEM kit includes all of the parts necessary for the light LEM 4.5-5lb trigger pull. As well as the heavy LEM 7.5-8 lb. trigger pull.

Each kit comes complete in new factory packaging & is factory fresh production direct from HK Germany.

Compatible with:

  • HK USP 9mm
  • HK USP .40
  • HK USP .45
  • HK USP compact 9mm
  • HK USP compact .40 & .357 Sig
  • HK USP compact .45
  • HK USP, USPC & HK45C, HK45 Tactical pistols
  • HK45C
  • HK45

Each LEM kit comes complete with the following LEM parts:

  • Hammer
  • Cocking piece
  • Hammer rebound spring
  • Light trigger return spring
  • Heavy trigger return spring
  • Hammer spring (long) for USP, USPC & HK45
  • Hammer spring (short) for the HK45C
  • Sear
  • Hammer Axle (solid)

Please note: That any pre-2005 production USP Variants will also need the new style catch part number 219442.

USP LEM & HK45 trigger pull weights quick guide:

  • Use the trigger return spring that may be in any newer production HK pistol or HK part # 209266 (black colored, thinner trigger return spring) for light LEM trigger pull, approximately 4-5 lbs.

  • Use the square spring shaped trigger return spring in the kit for the heavier LEM trigger pull, approximately 7-8 lbs.

    Developed especially for a U.S. government agency, the Law Enforcement Modification (or LEM for short), is a unique trigger mechanism created specifically to improve the trigger performance and reduce the weight of the Double-Action Only (DAO) trigger pull in the P2000SK, P2000, USP, USP Compact, HK 45, and HK 45 Compact pistols. With this mechanism, HK pistols can be fired like a standard DAO semi-automatic pistol where every round is fired by simply pulling the trigger fully rearward with the hammer starting at the forward rest position. The design of the propriety HK LEM system allows the weight of the DAO trigger pull to be reduced to a smooth and constant 7.5 - 8.5 pounds because the two-part hammer is pre-cocked every time the slide moves rearward. Or a smooth 4.5- 5.5 pounds if the operator opts for the lighter trigger pull configuration.

    Please note: The LEM kit will not work in the P2000, P2000SK, P30, P30L, VP9 & Mark 23

  • Condition: New
    Origin: German
    Sub-Type: Conversion Kit
    MPN: 260204
    Price: $149.95
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    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
    HK Universal LEM Kit Complete - HK45, USP, & USPC
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    Product Reviews

    Write your own review


    "Charles R. Lazarus"

    Charles Lazarus on 7/1/2011 1:09:05 PMVerified

    Overall Product Rating:


    All parts came as ordered and ina speedy time, I am very happy with the service & parts.


    "Great trigger"

    Donald Merchant on 3/1/2012 9:55:55 AMVerified

    Overall Product Rating:


    Great trigger! Note that if your HK is pre 2005 your existing catch won't work and the hammer will contact the firing pin if bumped. Travis at HK (706)568-1906 sent me the correct catch at no charge. They stopped including the catch in the kit because most people had newer guns and did not need it.


    "Not Universal with Pre-2005 USP"

    Kevin on 1/25/2011 3:29:22 PM

    Overall Product Rating:


    The new 2011 kit is missing the New Catch and Heavy Firing Pin Block Spring. If you have a Pre-2005 USP you will have to order separately the New Catch. You can NOT install this kit with your old catch. Contact HK customer support [email protected] and they may send you a New Catch no questions asked. You will also need to order the Heavy Firing Pin Block Spring if you want the heavy 8-8.5lb LEM trigger pull.


    "LEM kit"

    Monte Holmes on 8/3/2012 3:18:10 PMVerified

    Overall Product Rating:


    Bought my first HK used USP 45. Loved the de-cocker but hated the long, hard double action trigger pull. A friend of my bout a P30 with a LEM trigger and put a LEM trigger in His H&K 45C. After His I finally added a LEM to the old USP 45. Love, love, love it!


    "Like to Love"

    Mark Leso on 12/8/2011 7:44:12 AMVerified

    Overall Product Rating:


    Changed from a V1 to LEM (light). Loved the trigger immediately and highly recommend it. Went from "like" to "love" for shooting my HKUSP9C. The (light) kit installed easily with just 2 punches and a pick.


    "LEM kit for USPc 9mm"

    Mehmet Gerceker on 10/10/2011 2:33:07 PMVerified

    Overall Product Rating:


    The kit is complete except for instructions on how to install it. If you have that part under control you probably will love it.


    "Great up grade"

    Herbert Chutter on 8/21/2012 5:55:31 AMVerified

    Overall Product Rating:


    This kit made my usp compact 40 a pleasure to shoot compared to the var.1 trigger I replaced.The parts staff were very helpful in sorting which parts to use.Recommend highly.


    "Great service"

    walter b kulecz on 1/27/2012 10:26:57 AM

    Overall Product Rating:


    Great service, but they forgot to mention it won't work with the "older" USP models with the one-piece catch. They were very efficient at canceling my order when I learned this shortly after placing it. It'd be nice is they mentioned this under the "more details" section. I'm disappointed, but satisfied and won't hesitate to use hkparts.net next time I need HK parts.


    "LEM Conversion"

    Jan P on 10/16/2013 3:05:44 PM

    Overall Product Rating:


    Parts came as stated for both light and heavy LEM. Went with the light, love it, works perfect. Love the reset. No more cumbersome safety/decocker!


    "LEM Univeral kit installed in '94 USP 40"

    Mark S. on 5/12/2012 8:47:39 PM

    Overall Product Rating:


    A couple of things to note. This kit will work with a '94 USP (and perhaps a '93) however, it simply wont be a "drop in" conversion. The newer hammer axle wont fit the old style slot. Material has to be removed (ploymer from the frame) to fit this part as well as some polymer removal behind the trigger action bar to enable the proper reset (Dremel). These are the major mods. In addition to this LEM kit you will need the new style hammer strut part #214819, two piece catch and control latch. The ... More details